<br>
<br>

<div class="search_3 marginTop10">
    <form action="?main=search" method="POST" class="search_form">
        <input class="search_keyword" type="text" placeholder="Nhập từ khóa tìm kiếm" class="search-input" value=""  name="keyword" id="txtSearchKey" />
        <input type="submit" class="search_submit" value="Tìm kiếm"/>
    </form>
</div>